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TCS Placement Paper with Answer - SUSGOI, MOHALI, September 13, 2011

Posted By : Harshita Rating : +62, -7
Hi Friends,

TCS visited my college on 13th September for campus placement.There were four rounds for the placement procedure. They were

1. Online Aptitude test
2. Technical interview
3. Managerial interview
4. HR interview

The paper pattern for aptitude was 35 questions in 80 min.


Here are some of the questions which were there in my exams.

Question1: There is a toy train that can make 10 musical sounds. It makes 2 musical sounds after being defective. What is the probability that same musical sound would be produced 5 times consecutively? (1 of )?
Answer: 1/2 * 1/2 * 1/2 * 1/2 * 1/2 = 1/32
32 will be the answer. (My friends got similar question with "3 times consecutively"; for that the answer would be 8)

Question2: A research lab in Chennai requires 100 mice and 75 sterilized cages for a certain set of laboratory experiments. To identify the mice, the lab has prepared labels with numbers 1 to 100, by combining tags numbered 0 to 9. The SPCA requires that the tags be made of toxin-free material and that the temperature of the cages be maintained at 27 degree Celsius. Also, not more than 2 mice can be caged together and each cage must be at least 2 sq.ft in area. The 5 experiments to be conducted by lab are to be thoroughly documented and performed only after a round of approval by authorities. The approval procedure takes around 48 hours. How many times the tag is numbered '4' used by the lab in numbering these mice?
a)9             b)19       c)20     d)21  

Question3: A sheet of paper has statements numbered from 1 to 70. For all values of n from 1 to 70. Statement n says ' At least n of the statements on this sheet are false. ‘Which statements are true and which are false?
a)The even numbered statements are true and the odd numbered are false.
b)The odd numbered statements are true and the even numbered are false.
c)The first 35 statements are true and the last 35 are false.
d)The first 35 statements are false and the last 35 are false.

Solution: Suppose the first 35 statements are true!
Statement 1: At least 1 statement is false [TRUE]
Statement 2: At least 2 statements are false   [TRUE]
Statement 35: At least 35 statements are false  [TRUE]
Statement 36: At least 36 statements are false  [FALSE]
Statement 40: At least 40 statements are false  [FALSE]
AT LEAST puts the minimum tag or the floor tag on the statements
So, if the first 35 statements are true and the rest are false, everything fits into place!
Question4: In the reading room of a library, there are23 reading spots. Each reading spot consists of a round table with 9 chairs placed around it. There are some readers such that in each occupied reading spot there are different numbers of readers. If in all there are 36 readers, how many reading spots do not have even a single reader?
a)8   b)None         c)16         d)15  

Question5: A hunter walked one kilometer south from his camp. Then he walked one kilometer west. There he shot a bear. Then he walked one kilometer north, and found that he was back at his camp. What color was the bear?
a)Black b)White c)Brown d)None

Question6: A taxi driver commenced his journey from a point and he drove 10 km towards north and turned to his left and drove another 20 km. After waiting to meet a friend here, he turned to his right and continued to drive another 10 km. In which direction is he now?
a)West b)South c)North d)East

Question7: Bob, Peter, Oliver and 2 girls -Raven and Chelsey are to be seated in a row. Raven often gets sits to left of Bob. No girl sits at extreme positions and middle positions. Peter always sits at the extreme position. Who sits to the right of Chelsey?
a)Oliver b)Bob c)Peter/Oliver d)Peter

Question8: A toy train produces at least 10 different tunes when it moves around a circular toy track of radius 5m at 10 m/min. However, the toy train is defective and it now produces only 2 different tunes at random. What are the odds that toy train produces 6 consecutive music tunes of the same type.
a)32 b)64 c)36 d)6

Question9: A pie is to be divided among 20 people. A man eats 3 pieces, a woman eats 2 pieces and a child eats 1/2 a piece of pie. What is the number of men, women children, so that 20 people in total and everyone get the same pie? There are 20 pieces of pie in all.
a)7 women, 1 man, 12 children
b)5 women, 1 man, 14 children
c)4 women, 2 men, 12 children

Question10: 20 people meet and shake hands. The maximum number of handshakes possible if there is to be no ‘cycle' of handshakes is( a cycle of handshake is a sequence of people a1,a2,.....ak) such that people(a1,a2),(a2,a3).....(a(k-1),ak),(a2,a1) shake hand is
a)16 b)18 c)19 d)17

Question11: A seamstress buys a certain amount of Gingham cloth which comes in rolls that are exactly 56 inches wide. She has also bought a certain length of Seek sucker cloth and 35 inches wide. The seamstress first focuses on the Gingham roll ad discovers that she has 116 yards of Gingham and she wants to divide the gingham into 116 lengths of 1 yard each. She wants to have twice as many pieces of seek sucker as she does of the Gingham. It takes 4 seconds to cut each length of Gingham. Working non-stop, how long (in seconds) will it take her to cut all 116 pieces?
a)464 b)460 c)463 d)465

Question12: NY public library is one of the world's greatest repositories of books and journals. It has a beautiful reading room facing Manhattan's famous 5th Avenue. In the reading room are 10 reading spots. Each reading spot consists of a round table with 4 chairs placed around it. There are some readers such that in each occupied reading spot, there are different numbers of readers. If in all there are10 readers, how many spots are empty?
a)6 b)none c)5 d)4

Question13: There are 7 children and the youngest child is a boy. What is the probability that all of them are boys is 1 in
a)2! b)64 c)128 d)2

Question14: Determine the distance between x-intercept and z-intercept of the plane where equation is 6x+8y-3z=72.
a)3 b)26.83 c)9 d)25.63

Question15: A school yard contains only bicycles and 4 wheeled wagons. On Tuesday, the total number of wheels in the schoolyard was 114. What would be the possible number of bicycles?
a)8 b)7 c)6 d)8

Question16: Alok and Bhanu play the following coins in a circle game. 99 coins are arranged in a circle with each coin touching two other coins. Two of the coins are special and the rest are ordinary. Alok starts and the players take turns removing an ordinary coin of their choice from the circle and bringing the other coins closer until they again form a (smaller) circle. The goal is to bring the special coins adjacent to each other and the first player to do so wins the game. Initially the special coins are separated by two ordinary coins O1 and O2. Which of the following is true?
A. In order to win, Alok should remove O1 on his first turn.
B. In order to win, Alok should remove one of the coins different from O1 and O2 on his first turn.
C. In order to win, Alok should remove O2 on his first turn.
D. Alok has no winning strategy.
Solution: Between special coins there are two gaps.
first of 2 coin
second of 95 coin
if anuj goes with 2 coin gap he will lose as it is even
if anuj goes with 95 coin gap he will win as it is odd & last turn will be his

Question17: Susan made a block with small cubes of 8 cubic cm volume to make a block 3 small cube long, 9 small cubes wide and 5 small cubes deep. She realizes that she has used more small cubes than she really needed. She realized that she could have glued a fewer number of cubes together to lock like a block with same dimensions, if it were made hollow. What is the minimum number of cubes that she needs to make the block?
a) 114                     b) 135                c) 21            d) 71
Solution: The total volume (in terms of number of cubes) of the solid = 3*9*5 = 135
The total volume (in terms of number of cubes) of the hollow = (3-2)*(9-2)*(5-2)
= 21
so number of cubes required = 135-21 = 114

Question18: In the year 2002, Britain was reported to have had 4.3m closed - circuit television (CCTV) cameras - one for every 14 people in the country. This scrutiny is supposed to deter and detect crime. In one criminal case, the police interrogate two suspects. The ratio between the ages of the two suspects is 6:5 and the sum of their ages is 55 years. After how many years will the ratio be 8:7?
a) 11                       b) 6                   c) 10             d) 5  

Question19: Given a collection of 36 points P in the plane and a point equidistant from all points in P, which of the following are necessarily true?
A. The points in P lie on a circle.
B. The distance between any pair of points in P is larger than the distance between X and a point in P
a) A and B   b) neither A nor B   c) B only   d) A only
Solution: A only. B is not possible because line joining any two points in P becomes a chord which is always less than the radius (line joining X and any point in P) of circle

Question20: Spores of a fungus, called late blight, grow and spread infection rapidly. These pathogens were responsible for the Irish potato famine of the mid-19th century. These seem to have attacked the tomato crops in England this year. The tomato crops have reduced and the price of the crop has risen up. The price has already gone up to $45 a box from $27 a box a month ago. How much more would a vegetable vendor need to pay to buy 27 boxes this month over what he would have paid last month?
a) $27     b) $ 18   c) $45     d) $ 486

Question21: A man jogs at 6 mph over a certain journey and walks over the same route at 4 mph. What is his average speed for the journey?
a)4 mph   b) 5 mph   c) 2.4 mph   d)  4.8 mph

Question22: A lady has fine gloves and hats in her closet- 18 blue- 32 red and 25 yellow. The lights are out and it is totally dark in spite of the darkness. She can make out the difference between a hat and a glove. She takes out an   item out of the closet only if she is sure that if it is a glove. How many gloves must she take out to make sure she has a pair of each color?
a)50   b) 8   c) 60   d) 42
Solution: in the first case the lady takes up 32 red color
then he takes up 24 y (cause he should take up pair)
then he takes up 1y+1blue
then 2blue(cause to make sure he has a pair of each color in hand)

Question23: Francois Pachet, a researcher at Sony Computer Science laboratories is also a jazz musician. He decided to build a robot able to improvise like a pro. Named Continuator, the robot can duet with a live musician in real- time. It listens to a musical phrase and then computes a complementary phrase with the same playing style. If the cost of making robot is divided between materials, labor and overheads in the ratio of 4:6:2.If the materials cost $108. The cost of the robot is
a) $270     b) $324   c) $216   d) $ 648

Question24: Ferrari S.P.A is an Italian sports car manufacturer based in Maranello, Italy. Founded by Enzo Ferrari in 1928 as Scuderia Ferrari, the company sponsored drivers and manufactured race cars before moving into production of street-legal vehicles in 1947 as Ferrari S.P.A. Throughout its history, the company has been noted for its continued participation in racing, especially in Formula One where it has employed great success .Rohit once bought a Ferrari. It could go 4 times as fast as Mohan's old Mercedes. If the speed of Mohan's Mercedes is 46 km/hr and the distance traveled by the Ferrari is 953 km, find the total time taken for Rohit to drive that distance.
a) 20.72 b) 5.18 c) 238.25   d) 6.18  

Question25: Consider two tumblers, the first containing water & next contains coffee. Suppose you take one spoon of water out of the first tumbler and pour it into the second tumbler. After moving you take one spoon of the mixture from the second tumbler and pour it back into the first tumbler. Which one of the following statement holds now?
a) There is less coffee in the first tumbler than water in the second tumbler.
b) There is more coffee in the first tumbler than water in the second tumbler
c) There is as much coffee in the first tumbler as there is water in the second tumbler
d) None of the statements holds true.

Question26: There are two water tanks A and B, A is much smaller than B. While water fills at the rate of one liter every hour in A, it gets filled up like 10, 20, 40, 80, 160... In tank B. (At the end of first hour, B has 10 liters', second hour it has 20, and so on). If tank B is 1/32 filled after 21 hours, what is the total duration required to fill it completely?
a) 26 hrs       b) 25 hrs     c) 5 hrs   d) 27 hrs

Question27: Middle - earth is a fictional land inhabited by Hobbits, Elves, dwarves and men. The Hobbits and the Elves are peaceful creatures who prefer slow, silent lives and appreciate nature and art. The dwarves and the men engage in physical games. The game is as follows. A tournol is one where out of the two teams that play a match, the one that loses get eliminated. The matches are played in different rounds where in every round, half of the teams get eliminated from the tournament. If there are 8 rounds played in a knock-out tournol how many matches were played?
a) 257   b) 256   c) 72   d) 255
Solution: let no. of teams be x
after first round there will be x/2 teams remaining
after second round there will be (x/2)1/2=x/4 teams remaining
after eight round there will be (x/2^8) teams will be remaining
but after eight round only the winner team is remaining
therefore   x/256=1;
in eighth round 2 teams will be competing
so there will be 1 match
in 7th round 4 teams =2 matches
in first round 256 teams=128 matches
what we require is
total no. of matches played=1+2+4+8+16+32+64=128=255

Question28: On planet korba, a solar blast has melted the ice caps on its equator. 9 years after the ice melts, tiny planetoids called echina start growing on the rocks. Echina grows in the form of circle, and the relationship between the diameter of this circle and the age of echina is given by the formula
d = 4*√ (t-9) for t ≥ 9
Where d represents the diameter in mm and t is number of years since the solar blast. Jagan recorded the radius of some echina at a particular spot as 7mm. How many years back did the solar blast occur?
a) 17     b) 21.25     c) 12.25     d) 12.06

Question29: Rearrange the following letters to make a word and choose the category in which it Ms RAPETEKA
a) Bird   b) Vegetable   c) City     d) Fruit

Question30: Alok is attending a workshop "How to do more with less" and today's theme is Working with fewer digits. The speakers discuss how a lot of miraculous mathematics can be achieved if mankind (as well as womankind) had only worked with fewer digits. The problem posed at the end of the workshop is-
How many four digit numbers can be formed using the digits 1, 2, 3, 4 , 5 ( but with repetition) that are divisible by 4?
Can you help Alok find the answer?
a) 100           b) 125       c) 75     d) 85

Question31: A car manufacturer produces only red and blue models which come out of the final testing area completely at random. What are the odds that 5 consecutive cars of the same color will come through the test area at any one time?
a) 1 in 16 b) 1 in 125 c)1 in 32 d) 1 in 25
Solution: Prob of red = 1/2
Prob of blue = 1/2
Prob of 5consecutive colors is (1/2)^5
But there are two cases, cars are either all red or all blue so
Ans will be 2*(1/32)^5 ie 1 in 16

Question32: One day Alice meets pal and byte in fairyland. She knows that pal  lies on Mondays, Tuesdays and Wednesdays and tells the truth on the other days of the week byte, on the other hand, lies  on Thursdays, Fridays and Saturdays, but tells the truth on the other days of the week. Now they make the following statements to Alice - pal. Yesterday was one of those days when I lie byte. Yesterday was one of those days when I lie too. What day is it?
a) Thursday   b) Tuesday c) Monday d) Sunday
On Thursday, Pal say truth i.e. yesterday (Wednesday) was one of those days when I lie. It's true.
On the other hand, On Thursday, Byte lie i.e. yesterday (Wednesday) was one of those days when I lie too. It's a lie. So both satisfied. Hence it's Thursday.

Question33: Six friends decide to share a big cake. Since all of them like the cake, they begin quarreling who gets to first cut and have a piece of the cake. One friend suggests that they have a blindfold friend choose from well shuffled set of cards numbered one to six. You check and find that this method works as it should simulate a fair throw of a die. You check by performing multiple simultaneous trials of picking the cards blindfold and throwing a die. You note that the number shown by the method of picking up a card and throwing a real world die, sums to a number between 2 and 12. Which total would be likely to appear more often - 8, 9 or 10?
a)   8   b) All are equally likely c) 9   d) 10

Question34: A number when divided by D leaves a remainder of 8 and when divided by 3D leaves a remainder of 21. What is the remainder left, when twice the number is divided by 3D?
a) 13 b) cannot be determined c) 3 d) 42
Solution: suppose the no. is a
a = Dx +8 .......(1)
a = 3Dy + 21 .......(2)
So from 1 & 2 we get
D(x-3y) = 13
13 is prime so x-3y has to be 1
let x = 4 and y = 1
We get a = 60
2a = 120
So  120 when divided by 3D = 39
we get remainder as 3
So answer is 3

Question35: A toy train produces at least 10 different tunes when it moves around a circular toy track of radius 5 meters at 10 meters per minute. However, the toy train is defective and it now produces only two different tunes at random. What are the odds that the toy train produces 4 consecutive music tunes of the same type?
a)1 in 16   b)  1 in 4   c)  1 in 8
Solution: It can produce sound A , prob = 1/2 * 1/2 * 1/2 * 1/2 = 1/16
or sound B , prob = 1/16 (with the same logic)
So, probability of consecutive sound = 1/16 + 1/16 = 1/8


After the aptitude the results were announced at 8:00 pm in the night.I was very worried about my selection.I had done 30 questions but still I was worried about the cut off score.There is negative marking also.The cut off score is generally around 19,20.So if you do around 25 questions you are on the safer side.Just go through the previous papers.Also go through a mock test on
I was lucky to be the one among who were selected but then was the tension of next three rounds.

It was on the next day.So I would suggest for the technical interview read according to the branch in which you are as tcs people don't ask you anything beyond it.And don't try to fool them as they have in front of them to verify us.So if you don't know simply tell them.If you have some achievements in btech tell them about it.They are interested.My waiting time for interview started at 9 in morning.I was called at 9:30 at night.So after a long time duration I was not even a single bit tired due to my craze for TCS.There were 14 panels for the interview.I got panel 7 which constituted of the seniormost official of tcs and one another tcs person.They were famous for getting into the depth of technicality.That was the point when I was thinking that my bad luck wont leave me..But happened next was ...I entered the room..

Me:May I come in Sir?
1st person:Yah sure please come in.
(I entered and wished them)
Me:Good evening Sir.
1st:Very good evening Harshita.So have a seat.
So how was the day Harshita?
Me:It was very nice sir.
1st :U had to wait for a long time.Wasn't it tiring?
Me:Absolutely not sir.I enjoyed waiting.
1st:Ok harshita so tell me about urself..
Me:Told..about various presentations..prize at IIT,roorkee and proposal at IIT,Kharagpur..etc...
1st:Ok then tell me about the present research you are doing..
Me:Told about my research.
1st:If u are doing so much research so do you want to carry on it in future?
2nd :Tell me about high level and low level modulation?
1st:What is difference in diode and transistor?Give applications of both.
2nd:What is the use of amplifiers?
1st:Why tcs?
Me:I have got many reasons in pre placement talk so told..
1st:So y do u want to shift ur branch frm ece to it?
(He was a bit impressed by my answers)
1st:Any questions for tcs?
Me:Asked about the passport seva.
1st:Told for about 10 minutes..
Me:Thank u sir.
1st:Now you can go harshita..
Me:Thank u sir..
(After one hour I was sent for the HR interview)

10 ppl wer called at the same time.We wer made to stand in a semicircle.Then in 30 seconds wer asked to divide into team of two.So five teams wer formed.Then the HR told us abt software lyf cycle.The five departments and asked every team to take one an dxplain y dey opted for it.We took the enhancement department and justified it.
At about 12 am night results wer announced and I was the lucky one to be der..So just dying to write the line wich I read in all the placement papers..Finally got the chance.....


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